Air conditioning machine



June 7, 1938. I s. PASCHAL 2,120,203

- AIR CONDITIONING MACHINE Filed Feb. '26, 193' I 5 sheets-sum 2' INVENTOR.

9% Q BY Ma/ 7M ATTORNEY.

June 7, 1938. G. PASCHAL AIR conmuonme MACHINE Filed Feb. 26. 1957 5 Sheets-Sheet 3 INVENTQR.'

I ATTORNEY.

June 7,1938. 9. PASCHAL 2,120,203

AIR CONDITIONING MACHINE Filed Feb. 26, 19:57 5 Sheets Sheet 4 LINE V /1NVENTOR.

BY I ATTORNEY.

\\\\\\&W\\\\\\\\\\\\\\\\\\\\\\ /N5/DE 7; 1700/ 7 GU44 DQE-QH/Jb cs. PAscHAL AIR CONDITIONING MACKINE- June 7, 1938.

5 Shee ts-Sheet 5 Filed Feb. 26', -l9 37 UL/ TUNE/75'.

LINE

//\/5/05 UP QUE/77 :u m UUEEHUL INVENTOR.

ATTORNEY.

Patented June 7,1938

UNITED STATES V A v 2,120,208

2,120,208 Am CONDITIONING mom Guy Paschal, New York, N. Y., assignor, by mesne assignments, to Pleasantaire Corporation, New York N. Y., a corporation of Delaware Application February 26,1937, Serial No. 127.962 20 Claims. (c1. 52-129) chine is conditioning is passed through novel mechanism and is subjected to a unique washing process, and the impurities obtained therefrom are ejected from the machine.

Another object herein is the provision of a new air conditioning unit casing including internal partitioning and air current deflection and conduction, and novel means to support the casing and secure same in place.

Another object is the provision of means for .the adjustable, substantially air-tight, connection of the casing with the building orifice in which the casing is placed.

A further object is the provision of means to control the. mixture of outside and inside air treated by the air conditioner.

A feature of the invention is the provision of air conditioning structure which may be. reversed 30 in position and thereby used to heat and humidify the air inside of the room or other enclosure.

And still another feature of this invention is the provision of an air conditioning unit which is light in weight; economical in manufacture and use; presents a good appearance and is compact,

quiet, and efficient in operation.

These objects and other incidental features and advantages will more fully appearin the progress of this disclosure and as pointed out in the ap- 0 pended claims. 4

In the drawings, in which]. similar referenc characters designate corresponding parts.

throughout the several views: 45 Figure '1 is a front elevational view of a preferred embodiment of the invention as installed on awindowsill, showing the main casing and associated parts.

Figure 2 is anenlargedjfragmentary longitudinal vertical sectional view showing the adjustable clamping members and the adjacent portions of thecasing.

Figure 3 is a view similar to Figure 2 showing an alternate form of clamping member; 55 Figure 4 is a vertical transverse sectional'view of Fig. 1 as seen from the plane 4-4 indicated thereon.

Figure 5 is a perspective view of the air condi tioning unit with the casing removed, and-as seen from the front and right side thereof. In this view, the housings have been removed from the fans, and'theair current separator is omitted.

Figure 6 is a plan view of Figure 5 with the fan housings in position and the air current separator in place. 1

Figure 7 is a rear elevational view of Figure 6 with the air current separator removed.

Figure 8 is a schematic diagram of the invention, shown in position for cooling; washing, and dehumidifying the air inside of a room.

Figure 9 is a schematic diagram similar to Figure 8 with the position thereof reversed and thus f shown in position for heating and humidifying the air inside of a room.

Figure 10 is a. fragmentaory view of an alternate type of evaporating or cooling coil shown with the washing and filtering screen broken away forv purposes of clarity.

'Figure 11 is a sectional-view of Figure 10 as seen from the plane ll-ll thereon.

.In accordance with theinvention and with the accompanying drawings, the chassis l0 comprises an oblong plate H which is substantially rigid and has mounted thereon the operating elements of the air conditioning unit ll. The chassis is divided into at least two portions by a verticallyand diagonally disposed air current deflector or "-separator l2 as seen in Figures 6 and 8. Air current separator 12 is preferably thin and durable and may be constructed of sheet metal. Where desired, the separator'may have insulating material afllxed to each of the principal surfaces thereof. The air current separator in conjunction with the casing 25 and the base plate ll forms two compartments in the air conditioning 40 unit |'I,' as will be more fully described below and air-insulates these compartments from one another. To the left of separator ,II as viewed in Figure 8-, is found theair conditioning compartment and to the right of said separator there is found the refrigerant. compressing and condensing, and moisture expelling compartment.

In the air conditioning compartment, adjacent the leftedge of the base plate H and substantially parallel to and spaced therefrom is an evaporating or cooling .coil l3. Cooling coil l3 may be of any type suitable to withstand the required in-/ ternal pressure and having sufllcient radiationarea. Coil I 3 is preferably of compactconstruc tion, including a plurality of fins l4 and is mount-.

ed within a shallow moisture receiving trough I5. Trough I5 is suitably attached to base plate H by means of brackets l6, I1, and l8. The horizontal inside dimensions of said trough are preferably slightly larger than the horizontal dimensions of the coil l3, so that moisture condensing on said coil and fins l4 and a fine wire screen l9, will I more particularly set forth below.

Also in the air conditioning portion there is a rotary fan 20 driven by an electric motor 2|.-

-Motor 2| is maintained in position by .being mounted upon a pedestal type bracket 22 aiiixed to'the base plate Ii. Thefan 20 is so placed that it coincides with the opening 23 in the front wall 24 of the main casing 15. The fan 20 is preferably of a type adapted to move a large volume of air at, low speed, so that noise. is reduced, and said fan is provided with a housing 23'. As will be observed (Fig. 8), the separator or partition l2 extends at an angle to the end J or side walls of the casing from the rear of the casing adjacent one side wall toward the front wall and forms a cooling compartment which gradually enlarges from the rear toward the front of the casing. This angular or diagonal arrangement of the partition serves to permit a gradually expanding air stream to be discharged from the casing and gradually deflects the incoming air toward the fan. Moreover, the expanding form of the chamber facilitates mixing of the freshmake-up air with the recirculated room air within the cooling compartment. 4

In therefrigerant compressing and condensing, and moisture expelling compartment of the casing an auxiliary base plate 26 carries mounted thereon a known pump or compressor 21 and an electric motor 28 for driving same. Base plate 28 is resiliently mounted with relation to base plate ii, preferably by being mounted upon rub'"- ber blocks 3| and secured by bolts and nuts 32 therethrough. A starting condenser 23 -(in the electrical circuit) is carried by the. motor 28 which is resiliently mounted with relation to the compressor so that the driving belt 30 is maintained under constant tension. Belt 30 is carried by a small pulley 33 and a large pulley 34. Pulley 33 is mounted on the rear end of the motor shaft 35 adjacent the terminal thereof which carries mounted thereon a fan 36. Fan

36 is of atype similar to fan 23. Pulley 34 is preferably of heavy construction so that it acts as a fly-wheel for smoothing out the pulsations of the compressor 21.

Fan 36 is provided with a cylindrical housing 31 which is supported in position by two brackets 33- afilxed to the base-plate ll. The housing diameter is slightly greater than the circumferential sweep of the 'tips of the fan blades of the fan 33, and the length of the cylinder of the housing 31 is slightly greater than the transverse sweep of said blades. Where any'considerable stretching of the belt 331s encountered, the brackets 33 may beadapted forattachment to the auxiliary base plate 23 or to the motor 23 to prevent the blade tips the inner surface of the cylinder when the motor-shifts its position, and such construction is to be considered as within the scope of this invention. Housing 31 is provided witha pair of spaced opposed vertical walls 33, the rearmost of which is seen in Figure 7 of the accompanying drawings. Walls 39 in conjunction with the lowermost portion of the housing 31 form a shallow moisture expelling trough indicated by numeral 43 on said figure. An inlet 4| is provided at the lowermost portion of trough 40.

ably of such size that the condensing coil 42 and' fins 43 will just fit therein. The trough 44 communicates with trough I5 through a tube 41 and with the moisture expelling trough 40 through a tube 48. The trough 40 serves to bring the moisture into thermal-conductive relationship upwardly to enter a receiver I which is sup lowest convolution of said coil.

with the condensing coil, thereby not only cooling the soil, but also raising the temperature of the moisture before it reaches the fan, and thus facilitating expulsion of the heated moisture by the fan. The fan 'expels the moisture by direct contact ofv the fan blades, which dip into the trough 40, and also by discharge of the heated air over the moisture in the trough 40.

The refrigerant compressing and condensing compartment (Fig. 8). 'hasthe mechanism so arranged therein that the air is drawn inwardly througha portion, at least, of the condensing coil (in the present construction the entire coil). then over the compressor, the air being thereafter discharged from the compartment. The arrows (Fig. 8) indicate the passage of the ,air and, as will be observed, the inclination of thepartition with respect to the side or end walls of the casing, forms a compartment which gradually enlarges from the front toward the rear of the casing. 'This construction results in a deflection of the entering air by the partition longitudinally of the casing toward the fan and over the comv side of the compressor 31 and travels through a a long resilient tube 43 and enters the uppermost convolution of the condensing coil 43. The condensed refrigerant leaves the condensing coil 42 by way of a tube Sll'which is-connected tothe Tube 50 travels underneath the auxiliary base plate 23 and curves ported by' a bracket 82 affixed to the plate Ii. The receiver ll communicates by means of a tube 53 to a pressure relief or expansion valve 54 whichin turn connects with the upper convolution of cooling coil l3 .by means of a tube covered with a spongerubber insulating covering 53. The gaseous refrigerant leaves the lowimmediately adjacent the orifice.

radiating fins 62.

est convolution of coil 8 and travels through a tube 56 to the low pressure side of .the compressor of the tubes, so that all condensation moisture will be deposited in trough I5.

In Figures 10 and 11 there is shown an alternate type of cooling coil designated by numeral 68, while BI is a vertical supporting end piece. The horizontally disposed straight portions of tubing in coil which are disposed between the supporting end pieces (only one of which is seen, in Figure 10 or 11) are each provided along the upper and lower surfaces thereof with corrugated The term radiating as here used is taken from the art to which this device pertains, it being understood that when coil 88 is used as a cooling coil, these fins conduct heat away from the air and into the coil. The configuration of these fins is best seen in said figures, and these fins are preferably attachedto the tubing by soldering. Because the fins 82 are generally horizontally disposed, the lower bends 88 of the corrugations serve as water collecting sluices as will be set forth below. The air conditioning unit is supplied with water from these fins as well as from other parts.

The air conditioning mechanism on the chassis is supported within a box-like casing 25 therefor which not only serves to enclose and protect the parts. but also is adapted to act as a conduit for air flowing therethrough. The casing may be constructed of any suitable material such as wood or metal. When constructed of metal asillustrated in Figure 1, the dotted lines 84 indicate the inner surface of the casing and the dotted lines 65 indicate sound deadening material placed against the inner surface of the casing. The casing is provided with integral blocks 88 adjacent the lower edge thereof which are adapted to engage the upper surface margin of the base plate I The blocks 88 are provided with threaded orifices and screws (not shown) penetrate the holes 81 and are secured within said blocks thereby holding the casing in place.

Affixed to the under surface of the top wall 88 and to the inner surfaces of the front-wall 25- and the rear wall 68, is the previously referred to air current separator l2 which is a partition, the lower edge of which is suitably indented so that it forms a substantially air-tight fit with the wires 10 carrying current to motor 2|; the tubes 41, 53, and 58; and thebracket 48. Or, said-lower edge may be spaced from the base plate I! with a resilient felt \strip therebetween housing 23' when desired.

The rear wall 68 is provided with a large rectangular orifice 12 which coincides with the condensing coil 42'and a circular orifice 18 which coincides with the fan 88 and housing 81-. As will be noted, the condensing coil 42 is disposed vertically and is substantially co-extensive with the opening or orifice 12 which it directly faces The end wall 14 is provided with a rectangular opening-15 which coincides with the cooling coil g 3 l8, while the end wall 18 has no such opening. It will be noted that the cooling coil l8is disposed vertically immediately adjacent the opening 15 and is substantially co-extensive with this opening. It also extends over that portion of the opening which is'outside the vane-(hereinafter described), and thus fresh make-up air entering the coolingcompartment also passes through the cooling coil. The arrangement .of the coil immediately adjacent theopening 18 insures that all the re-circulated air passes through the coil.

The casing 25 and chassis l8 generally comprise the air conditioning unit (indicated by numeral 11) which is adapted to be supported on a window sill 18. In order to reduce noise and the transmission of vibration to the building 18; a sponge rubber pad 88 is interposed between the unit 11 and.th,e sill 18. The movable window sash 8| is adapted to meet the top wall 88 and a rubber pad 82 is'used at this point.also. In order to provide asubstantially air-tight 11 with the adjacent vertical portions 88 of the window frame, the end walls 14 and 18 have adjustable vanes afllxed thereto. These vanes pro-' ject vertically and perpendicularly with relation and 81 have been moved or extended, to engage the vertical grooves 88 in thelportions88, thescrews may be tightened to secure the vanes 88 and 81 in place. The stationary vane 84 is preferably aflixed to the end walls 14 by means of integral right angle brackets 8| and 82, which are either bolted as shown, or spot welded to said, end wall, as seen in Figure 4. Bracket 8| at the inner and lower edge thereof, is provided with a rabbet'88, and bracket 82 at the inner and upper edge thereof is provided with a rabbet 84. A slidable air inlet control plate is adapted for manual adjustment horizontally within said rabbets. Plate 85 is shown in open position in full lines, and at a half closedadjustment in dot-dash lines on Figure 4, but suflicient travel is provided to allow the plate 85 to completely cover the portion of the orifice 15 lying between vane 84 and the brackets 8|. and 82. The stationary vane 88 is secured in place similarly to vane- 84, but the brackets (not shown) corresponding to brackets 8| .and 82 need not be as long, nor need they be rabbeted.

In order that the unit 11 may be properly positioned with relation to the building orifice, or as illustrated, a window; andin'order that unit 11 may be mounted safely and securely on relatively I narrow window sills-clamping members 88 and trate horizontally disposed slots in vanes 84 and 8,5. Screws 88 are each provided with nuts 88 so that after the free vertical edges of vanes 88 35 81 are utilized. Members 88 and 81 are adapted when horizontally extended to engage the grooves 88 and may be provided with suitable gripping ends such as chisel shape terminals 88. Members 88 and 81 are mounted in a horizontally disposed unit tube 88 which is suitably afllxed to the under surface. of top wall 88, 'as for example by welding and the terminals of said tube penetrate in any desired position by set screws I82 and III adjusted by inserting a rod or other tool in the orifice I 04'and rotating the member 36 so that the blunt point 98' engages the groove 30.. Mem- 16 her 96' is secured inposition by tightening the nut I02. In this form, the clamping member .may be caused to exert considerable outward pressure and. is especially suitable for windows having metal stationary frames, or windows in 20 which the stationary frame presents a smooth surface with no grooves corresponding to grooves 90. It may benoted here that the lowest horizontal exposed surfaces of the clamping members abut against the upper edges of the vanes 8486 25 and 85--8'|, while the highest surfaces of the exposed portions of the clamping members contact pad 82.

Operation 30 With the electric circuit completed to a source of E. M. F., the refrigerating system begins to.

function and fans 20 and 36 to revolve. Air from inside of the room, and the desired proportion of outside air if used in any ratio, enters orifice i5 and passes through the cooling coil l3 and through the screen l9. Owing to the low temperature of cooling coil I 3, the temperature of the air andthe dew point are considerably reduced. The cooled air passes at one side of the 40 air current separator l2 and is circulated into the room by the fan 20 through the housing 23. By reason of this machine and the operation thereof, it is found that refrigeration and reduction in air temperature has been obtained with 45 greater efliciency and at less cost than heretofore possible in other machines of like nature. As'it is now understood, the screen l9 restricts to some extent, the rate of flow of the air through the cooling coil and screen, and thus by reason of the 50 reduction of speed, the air is caused to give up sensible heat and a greater quantity of latent heat, than has been the practice. If desired, for the purpose of obtaining more metal area, the screen may be physically contacted with the cool- 55 ing coil fins at many points, thereby giving more metal area for conducting away heat taken from the air. The water which condenses out of the air collects on the cooling coil tubes, on the fins 43 or 62, in the sluices 63 and on the screen I9. 60 The moisture in the path of the air picks up solid particles from the air. causes the air to be washed and causes to be deposited into the water, a largeamount of the solid particles suspended in the air. The screen 65 restricts the flow of air through the cooling coil and thefan associated therewith creates a par-' tial vacuum within the air conditioning portion '75 Asthe screen it loads up, the water drains by gages the internally threaded tube 96' may be The screen when wettrough 44 where the cold water contacts the low-' est convolutions of the condensing coil 42, thereby increasing the efiiciency thereof. The water now increased in temperature flows by gravity through the tube 48 to the trough 40 whence it is picked up by the rapidly moving tips of fan 36 and blown outdoors in, the form of an atomized spray carrying the suspended matter with it. In many instances, the tips of the fan blades never touch the water, but the flow of air (already heated by the condensing coil, compressor, and compressor motor) over the water caused by the operation of the fan, causes the water to evaporate and be expelled outdoors through orifice 13.

When particularly dirtyair is being conditioned, larger particles may be precipitated in the trough I5 and an auxiliary tray may be included therein to collect this sludge.

Where'it is desired for purposes of economy or other reasons, the tube 41 may'communicate directly with the tube 48 which preferably is of resilient construction where the housing 31 is mounted on the motor 28 or base plate 26 as has beenv described above. In this construction, the trough 44 and associated parts may be eliminated, with a consequent reduction in condensing ethciency.

Air from the outdoors enters the orifice l2 and passing through the condensing coil 42, over compressor 21 and associated parts, and over motor 28, cools them, and then the air passing through the housing 31 is ejected outdoors again, through orifice I3.

As illustrated in Figure 9, when the weather outdoors is cool enough 'to require heating inside the room, the unit 11 may be reversed in position on the sill 18 so that the principle ofv reverse refrigeration may be employed. The inside or room air, in this arrangement, enters the orifice l2 and is heated by the condensing coil 42, compressor 21, and motor 23, and is humidified by the action of fan 36 and trough 40 as set forth above. In some instances where the outside air is laden with impurities.,it may be desirable to employ a screen in orifice 15 to reduce the number of particles in the condensed water, or if desired the water flowing through the pipe 41 may be filtered.

It may now be seen that there has been disclosed a new and useful portable air conditioning unit. Among the many novel features therein are the following: The air current separator obviates the necessity for separate bulky'ducts to carry the difierent currents of air through the machine, since the separator in conjunction'with the casing forms the necessary ducts. By reason of the original location and disposition of said separator bothcurrents of air entering the unit casing are completely insulated from each other and these currents strike the separator at a desirable angle so that a smooth air flow results, with consequent reduction in power consumed by the fans. The unique arrangement of the parts in correlation with each other and with the separator results in compactness and efliciency. The clamping members and adjustable vanes adapt the air conditioning unit for varying installation conditions encountered and prevent the unit from becoming accidentally dislodged. The slidable air inlet control plate regulates the mixture of room air and outside air in an adequateand simple manner, when it is desired to add outsideair. The novel screen and cooling coil combination results in the ability to wash the air being conditioned by water obtained from that air, thus requiring no plumbing connection to obtain water. Particles removed from the air are ejected automatically from the unit, as well as the water when it has served its purpose, so that no sewage connection is required. The screen by restricting the flow of the air and subjecting it to greater turbulation increases the reirigerating effect of the cooling coil, and further, the screen by providing greater wet surface in the path of the air flow increases the washing effect on the air and in this action automatically increases the amount of solid particles or impurities taken from the air.

The foregoing description has been made rather detailed for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible in view of the prior art.

.I claim:

1. In an air conditioning machine: a cooling 'coil, a relatively shallow trough, a condensing posed at least in part in said trough, a fan, a

' to collect the excess water released by the primary means, one conduit means between the secondary means and the trough, and another conduit means between the trough and the housing, whereby water in the primary means may flow to the trough and thence to the housing, there to Y be expelled'by said fan. Y

3. In an air conditioning machine: a cooling coil, a tan, a housing for said fan, primary means associated with said cooling coilto collect the condensed water deposited on said cooling coil and to hold that water in the path of air passing through the cooling coil whereby the air is washed, collecting means associated with the primary means to collect the excess water released by the primary means, and connecting means between the collecting means and the housing whereby water may flow from the collecting means to the housing there to be expelled by the fan. 4. In an air conditioning machine: a casing having an opening in one wall thereof, a vane extending outwardly from said casing intersecting said opening whereby two entrances are formed for the admission of air from two diiferent sources into said opening, an air inlet control plate adapted to adjustably close one of said entrances whereby the relative mixture of air from-the two sources is regulable.

5. Ifi'anairconditioning unit in combination, a. casing, means for dividing the easing into at least two compartments, means for circulating' room air through one compartment, means for reducing the temperature of the air passing through said compartment, and a iine mesh metal screen thermally connected to said temperature- .least two compartments, means for circulating room air through one compartment, means for reducing the temperature of the air-passing through said compartment and causing moisture of the air to condense into water, and a screen attached to said temperature-reducing means disposed across the space through which said air is required to pass for collecting and holding some of the condensed water to wash the chilled air passing through the screen.

7. In an air conditioning unit, a substantially L rectangular casing adapted to be bodily positioned in a window opening or similar aperture with its front wall and portions at least of its side walls exposed to the interior and its back wall entirely exposed to theiexterior of the room having such window opening or aperture, a transverse vertical partition dividingthe casing into at least two compartments sideby side, said compartments being completely air insulated one ,from the other by said partition, a cooling coil in one compartment, means for circulating a cooling medium through said coil, said we compartment having an opening in one side of said casing for the introduction of air to pass through said coil, said coil being positioned directly to the rear of said opening and substantially co-extensive in area therewith, a second opening in another wall of said one compartment through which the air 'entering said compartment-is discharged, means for inducing the circulation! of air into and from said compartment through said openings, a vane extending outwardly from saidone side of said-cas: ing and dividing said first mentioned opening into two parts, said vane being adapted to cooperate with the window frame to direct fresh I air from the exterior of the room through one part and room air through the other part of said opening.

8. In an air conditioning unit, a substantially rectangular casing adapted to be bodily positioned in a window opening or similar aperture I with its front wall and portions atleast of its side walls-exposed to the interior and its back wall entirely exposed to the exterior oi the room having 'sucfi window opening or aperture, a transverse rectly to the rear oi saidlopening and substantially coextensive in area therewith, a second opening in another wall ofsaid one compartment I through which the air entering said compartment is discharged, means for inducing the circulation of air into and from said compartment through said openings, a vane extending outwardly fromsaid one side oi! said casing and excluding outside air from said recirculated room air opening, said casing having another opening in said one side exterior of said vane for the introduction into said compartment of fresh outside make-up air. 9. An air conditioning unit as specified in claim 8, including adjustable means for controlling the admission of fresh outside make-up'air into said one compartment. 10. An air conditioning unit as specified in claim 8 in which the cooling coil extends over into at least two compartments side by side and a completely insulating one compartment from the other, said partition being at an angle to the side walls and extending from the rear of the casing adjacent one side wall toward the-front wall to form one compartment which enlarges from the rear wall toward the front wall of the casing, a

cooling coil in said one compartment, means for circulating a cooling medium through said coil, the side wall of the casing forming one sideof said one compartment having an opening therein i'orthe introduction of air to pass through said coil, said coillbeing positioned directly to the rear of said opening'and substantially co-extensive therewith, a second opening at the front wall of said one compartment :through which the air entering said compartment is discharged, 9. fan 1 positioned directly to the rear of said second opening and discharging air therethrough, said fan serving toinduce circulation of air into and from said compartment through said openings.

12. In an air conditioning unit, a substantially rectangular casing adapted to be bodily positioned in a window opening or similar aperture with its front wall and portions at least of its, side walls exposed to the interior of the room having such window openings or aperture, a transverse vertical partition dividing the casing into at least two compartments side by side and completely insulating one compartment from the other, said partition being at an angle to the side walls and extending from the rear of the casing adjacent one side wall toward the front wall to form one compartment which enlarges from the rear wall toward the front wall of the casing, a cooling coil in said one compartment, means forcirculating a cooling medium through said coil, the

side wall of the casing forming one side of said .inducing the circulation of air into and from said compartment through said openings, a vane extending outwardly from said side of the casing containing said opening and adapted to make a substantially air-tight fit with the wall 'of a window opening or similar aperture, said vane intersecting said air introduction opening whereby to leave a portion thereof open to the exterior of a window opening and permit the introduction'of fresh outside make-up air.

13. In an air conditioning unit, a substantially rectangular casing adapted to be bodily positioned in a window opening or similar aperture with its front wall and portions at least ofits side walls exposed to the interior and its back wall entirely exposed to the exterior of the room having such window opening or aperture, a transverse vertical partition dividing the casing into at least two compartments side by side, said compartments being completely air insulated one from the other by said partition, a cooling coil in one compartment, means for circulating a cooling medium through said coil, said one compartment having an opening in one side of said casing for the introduction of air to pass through said coil, said coil being positioned directly to the rear of said opening and substantially co-extensive in area therewith, a second opening-in another wall of said one compartment through which the air en:

tering said compartment is discharged means for inducing the circulationof air into and from said compartment through said openings, the back wall ofsaid casing in said other compartment having an open portion, a condenser coil over and immediately facing said open portion of the back wall, a compressor unit disposed rearwardly of said condenser unit, and an exhaust fan facing and discharging through said open portion of said back wall and disposed to one 14. An air conditioning unit as specified in claim 13, in which said partition extends at an angle with respect to the side walls from the rear of the casing adjacent one side wall toward.

the front wall thereby forming said one compartment so that it progressively enlarges from the rear toward the front of the casing and said other compartment so that it progressively enlarges from the front toward the rear of the casing, whereby the recirculated air entering said one compartment through its side wall is gradually deflected toward the front wall of the casing and the air entering said other compartment through the rear wall is gradually deflected longitudinally of the casing.

15. An air conditioning unit as specified in claim 13, in which said partition extends at an angle with respect to the side walls from the j rear of the casing adjacent one side wall toward the front wall thereby forming said one compartment so that it progressively enlarges from the rear toward the front of the casing and said other compartment so that it progressively en-' larges from the front toward the rear of the casing, and in which the air inlet portion of the back wall of said other compartment is adjacent tition, whereby the recirculated air entering said one compartment through 'its' side wall is gradually deflectedtoward the front wall of the casing and the air entering said other compartment through the rear wall is gradually deflected longitudinaly of the casing over the compressor and toward the fan.

; said partition and between the fan and the parh 16. In an air conditioning unit, a casing, a par- 7 ment, means for circulating a cooling medium through said coil, said one compartment having an opening in one wall of said casing for the introduction of recirculated room air to pass through said coil, saidcoil being positioned dia I s,iao,aos rectly to the rear of said opening and an ment is discharged,- means for inducing the circula'tion oi! air into and from said one compartment through said opening, a second compartment opening to the'exterior through the back wall of said casing, a compressor unit insaid second compartment, a condenser coil in said second compartment, a fan for causing circulation oi air into and out of said second compartment, a drip pan associated withsaid'coolingcoil for receiving excess moisture released by the coil,a conduit tor gravitationally conducting such moisture from said pan, a trough associated with said fan 4 for receivingand storing such moisture, said trough being disposed sufliciently close to the fan -to permit the fan to have a moisture discharging eii'ect.

17. In an air conditioning unit, a casing, a partition dividing the casing into at least two compartments and air-insulating said compartments one from the other, a cooling coil in one compartment, means for circulating a cooling me-- dium through said coil, said one compartment hating an openingiin one wall 'of said casing for e the introduction of recirculated room air to pass-- through said coil, said coilv being positioned directly to the rear oi. said opening and substantially co-extensive in. area therewith, a second opening in anotherwall of said one compartment through which the air entering said compartment'is discharged, means for inducing the circulation oi air into and from said one'compartment through said opening, a second compartment opening to the exterior through the back wail of said casing. a compressor unit in said second compartment, a condenser coil in said second compartment. a fan for causing circulation of air into and out of said second com'- .partment, a drip pan associated with said cool-' ing coil for receiving excess moisture released by the coil, a-conduit ior'gravitationally conducting such moisture from said pan, a trough associated with said ian forreceiving and storing such moisture, said trough being disposed sufliciently close to the fan to permit the fan blades to dip into the moisture. I

'18. An air conditioning unit as specified in claim 16 in which the means for conducting the moisture from the drip pan to the fan includes means i'orbringing the moisture into thermalconductive association with the condenser coil.

19. An air conditioning unit as specified in claim 1'1 in which the means for conducting the moisture from the drip pan to the fan includes means for bringing the moisture into thermalconductive association with the condenser coil.

20. In an air conditioning unit, a casing adapt-v ed to be positioned bodily in a window opening or similar aperture with its front 'wall and portions at least of its side walls exposed 'to the means for mounting the casingin awindow or similar aperture.said last-mentioned means comprising a row-like element extending outwardly from each sidewall of the casing, means for moun I each rod for adjustment inwardly and outwardly with respect to its side wall, and means for securing each rod in any selected position,

said rods serving as handle supports for the unit and anchoring means to engage the side walls of an aperturein which the unitis mounted;

any mm 

